The San Mateo, California-based company said it had a loss of 74 cents per share. Losses, adjusted for stock option expense and costs related to mergers and acquisitions, were 60 cents per share.
The results fell short of Wall Street expectations. The average estimate of 13 analysts surveyed by Zacks Investment Research was for a loss of 36 cents per share.
The action video camera maker posted revenue of $240.6 million in the period, which also fell short of Street forecasts. Eight analysts surveyed by Zacks expected $303.3 million.
For the current quarter ending in December, GoPro expects its per-share earnings to range from 25 cents to 35 cents.
The company said it expects revenue in the range of $600 million to $650 million for the fiscal fourth quarter.
GoPro expects full-year revenue in the range of $1.25 billion to $1.3 billion.
GoPro shares have fallen 34 percent since the beginning of the year. In the final minutes of trading on Thursday, shares hit $11.94, a drop of 52 percent in the last 12 months.